Date: Mon, 23 Dec 2019 10:55:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 242828] diff -rq still does full file comparison Message-ID: <bug-242828-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D242828 Bug ID: 242828 Summary: diff -rq still does full file comparison Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: ml@netfence.it In a task of mine I often have to "diff -rq" two directories which have ~75= 000 files; those files are usually very similar, with a only a few lines differ= ing. Some of them have up to 25M lines. On 11.3 (which feature GNU diff), the whole process usually take a few minu= tes. On 12.1 (which feature BSD diff), I was never able to complete it: most of = the times I just interrupted it after some hours, but in a case it did crash the whole system due to an out of swap situation (16GB RAM + 32GB swap!!!). I tried to find out the reason with gdb and I am convinced that: _ 11.3, as soon as it sees a file differs, will move to the next one; _ OTOH, 12.1 will still compute the whole diff set for that file, although = it just have to print "File x and y differ". Of course, there's a workaround as simple as installing textproc/diffutils = and using "gdiff" instead of "diff". --=20 You are receiving this mail because: You are the assignee for the bug.=
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